Macbeth and The Real World are both examples of what happens when a person is out of control. In The Real World, the reality show stars act irresponsibly and do not care if the world can see it. Macbeth pretty much behaved the same way. He was only interested in what he wanted. He did not care what the consequences of his actions were. He was only interested in getting revenge.
In each case, things started out reasonable and then got out of control. The Real World roommates were not always so badly behaved, and Macbeth was once a respected hero.
The series was hailed in its early years for depicting issues of contemporary young-adulthood relevant to its core audience, such as prejudice, sexuality, AIDS and substance abuse, but later garnered a reputation as a showcase for immature and irresponsible behavior. (Wikipedia)
Peer pressure is also at stake in both cases. Macbeth’s wife was also out of control. As with The Real World, irresponsible behavior is contagious in Macbeth. In The Real World, young men and women make bad choices because everyone around them is making bad choices.
If we should fail?
But screw your courage to the sticking-place,
And we'll not fail. (1:7)
Macbeth starts to make bad choices because Lady Macbeth does.